Reduction of Structure-borne Idle Noise with the Insertion of a Composite Body inside Vehicle Body Skeleton
차체골격내 복합체 삽입을 이용한 구조기인 아이들 소음저감

Hyo-Sig Kim, Joong-Hee Kim
2012 Transactions of the Korean Society for Noise and Vibration Engineering  
As a matter of fact, it has been not allowed to modify the shape of a vehicle body skeleton since the technical definition for the structure was fixed and the corresponding molds were developed. By the way, if it is available to apply an alternative to reinforce the skeleton without changing its mold, it must be much flexible to improve the performance qualities relevant to not only NVH(noise, vibration and harshness) but also crash and durability. Recently, a solution of so-called composite
more » ... called composite body becomes available for the need. We present a design method to insert the composite body inside a vehicle body skeleton in order to improve a structure-borne noise at the idle condition. The algorithms, topology optimization and design sensitivity analysis, are applied to mainly search the sensitive structural sections in the body skeleton and to extract the target stiffness of the sections. Inserting the composite bodies into the sensitive portions, it is predicted to achieve the countermeasures which can compromize the design availability in terms of the idle noise and weight. According to the validation result with test vehicles, the concerned noise transfer function is reduced and the idle booming noise is resultantly improved. * 1. 서 론
doi:10.5050/ksnve.2012.22.4.335 fatcat:7gunhxubyvgybgbmefooyw4ria